<!DOCTYPE html> <link rel="help" href="https://www.w3.org/TR/css-break-3/#fragmentation-model"> <link rel="match" href="../reference/ref-filled-green-100px-square-only.html"> <style> fieldset { margin:0; border:none; padding:0; } </style> <p>Test passes if there is a filled green square.</p> <div style="columns:5; column-gap:20px; column-rule:20px solid green; column-fill:auto; width:180px; height:100px;"> <fieldset style="max-height:100px;"> <div style="height:300px; background:green;"></div> </fieldset> </div>